Allow changing input pixelWidthHeightRatio for GlEffectsFrameProcessor.

pixelWidthHeightRatio is now passed to setInputFrameInfo instead of
the factory.

PiperOrigin-RevId: 457696703

library/transformer/src/androidTest/java/com/google/android/exoplayer2/transformer/GlEffectsFrameProcessorPixelTest.java

@@ -366,7 +366,6 @@ public void onFrameProcessingEnded() {
                       frameProcessingEnded = true;
                     }
                   },
-                  pixelWidthHeightRatio,
                   /* streamOffsetUs= */ 0L,
                   effects,
                   /* outputSurfaceProvider= */ (requestedWidth, requestedHeight) -> {
@@ -381,7 +380,8 @@ public void onFrameProcessingEnded() {
                   },
                   Transformer.DebugViewProvider.NONE,
                   /* enableExperimentalHdrEditing= */ false));
-      glEffectsFrameProcessor.setInputFrameInfo(new FrameInfo(inputWidth, inputHeight));
+      glEffectsFrameProcessor.setInputFrameInfo(
+          new FrameInfo(inputWidth, inputHeight, pixelWidthHeightRatio));
       glEffectsFrameProcessor.registerInputFrame();
 
       // Queue the first video frame from the extractor.

library/transformer/src/main/java/com/google/android/exoplayer2/transformer/FrameInfo.java

@@ -23,15 +23,17 @@
   public final int width;
   /** The height of the frame, in pixels. */
   public final int height;
+  /** The ratio of width over height for each pixel. */
+  public final float pixelWidthHeightRatio;
 
-  // TODO(b/227625423): Add pixelWidthHeightRatio.
   // TODO(b/227624622): Add color space information for HDR.
 
-  public FrameInfo(int width, int height) {
+  public FrameInfo(int width, int height, float pixelWidthHeightRatio) {
     checkArgument(width > 0, "width must be positive, but is: " + width);
     checkArgument(height > 0, "height must be positive, but is: " + height);
 
     this.width = width;
     this.height = height;
+    this.pixelWidthHeightRatio = pixelWidthHeightRatio;
   }
 }

library/transformer/src/main/java/com/google/android/exoplayer2/transformer/FrameProcessor.java

@@ -46,6 +46,9 @@ interface Listener {
    *
    * <p>The new input information is applied from the next frame {@linkplain #registerInputFrame()
    * registered} onwards.
+   *
+   * <p>Pixels are expanded using the {@link FrameInfo#pixelWidthHeightRatio} so that the output
+   * frames' pixels have a ratio of 1.
    */
   void setInputFrameInfo(FrameInfo inputFrameInfo);
 

library/transformer/src/main/java/com/google/android/exoplayer2/transformer/GlEffectsFrameProcessor.java

@@ -50,8 +50,6 @@
    *
    * @param context A {@link Context}.
    * @param listener A {@link Listener}.
-   * @param pixelWidthHeightRatio The ratio of width over height for each pixel. Pixels are expanded
-   *     by this ratio so that the output frame's pixels have a ratio of 1.
    * @param effects The {@link GlEffect GlEffects} to apply to each frame.
    * @param outputSurfaceProvider A {@link SurfaceInfo.Provider} managing the output {@link
    *     Surface}.
@@ -64,7 +62,6 @@
   public static GlEffectsFrameProcessor create(
       Context context,
       FrameProcessor.Listener listener,
-      float pixelWidthHeightRatio,
       long streamOffsetUs,
       List<GlEffect> effects,
       SurfaceInfo.Provider outputSurfaceProvider,
@@ -80,7 +77,6 @@ public static GlEffectsFrameProcessor create(
                 createOpenGlObjectsAndFrameProcessor(
                     context,
                     listener,
-                    pixelWidthHeightRatio,
                     streamOffsetUs,
                     effects,
                     outputSurfaceProvider,
@@ -110,7 +106,6 @@ public static GlEffectsFrameProcessor create(
   private static GlEffectsFrameProcessor createOpenGlObjectsAndFrameProcessor(
       Context context,
       FrameProcessor.Listener listener,
-      float pixelWidthHeightRatio,
       long streamOffsetUs,
       List<GlEffect> effects,
       SurfaceInfo.Provider outputSurfaceProvider,
@@ -136,20 +131,12 @@ private static GlEffectsFrameProcessor createOpenGlObjectsAndFrameProcessor(
       GlUtil.focusPlaceholderEglSurface(eglContext, eglDisplay);
     }
 
-    ImmutableList.Builder<GlMatrixTransformation> matrixTransformationListBuilder =
-        new ImmutableList.Builder<>();
-    if (pixelWidthHeightRatio != 1f) {
-      matrixTransformationListBuilder.add(
-          createPixelWidthHeightRatioTransformation(pixelWidthHeightRatio));
-    }
-
     ImmutableList<GlTextureProcessor> textureProcessors =
         getGlTextureProcessorsForGlEffects(
             context,
             effects,
             eglDisplay,
             eglContext,
-            matrixTransformationListBuilder,
             outputSurfaceProvider,
             streamOffsetUs,
             listener,
@@ -173,26 +160,6 @@ private static GlEffectsFrameProcessor createOpenGlObjectsAndFrameProcessor(
         textureProcessors);
   }
 
-  /**
-   * Returns a new {@link GlMatrixTransformation} to expand or shrink the frame based on the {@code
-   * pixelWidthHeightRatio}.
-   *
-   * <p>If {@code pixelWidthHeightRatio} is 1, this method returns an identity transformation that
-   * can be ignored.
-   */
-  private static GlMatrixTransformation createPixelWidthHeightRatioTransformation(
-      float pixelWidthHeightRatio) {
-    if (pixelWidthHeightRatio > 1f) {
-      return new ScaleToFitTransformation.Builder()
-          .setScale(/* scaleX= */ pixelWidthHeightRatio, /* scaleY= */ 1f)
-          .build();
-    } else {
-      return new ScaleToFitTransformation.Builder()
-          .setScale(/* scaleX= */ 1f, /* scaleY= */ 1f / pixelWidthHeightRatio)
-          .build();
-    }
-  }
-
   /**
    * Combines consecutive {@link GlMatrixTransformation} instances into a single {@link
    * MatrixTransformationProcessor} and converts all other {@link GlEffect} instances to separate
@@ -207,7 +174,6 @@ private static ImmutableList<GlTextureProcessor> getGlTextureProcessorsForGlEffe
       List<GlEffect> effects,
       EGLDisplay eglDisplay,
       EGLContext eglContext,
-      ImmutableList.Builder<GlMatrixTransformation> matrixTransformationListBuilder,
       SurfaceInfo.Provider outputSurfaceProvider,
       long streamOffsetUs,
       FrameProcessor.Listener listener,
@@ -216,6 +182,8 @@ private static ImmutableList<GlTextureProcessor> getGlTextureProcessorsForGlEffe
       throws FrameProcessingException {
     ImmutableList.Builder<GlTextureProcessor> textureProcessorListBuilder =
         new ImmutableList.Builder<>();
+    ImmutableList.Builder<GlMatrixTransformation> matrixTransformationListBuilder =
+        new ImmutableList.Builder<>();
     for (int i = 0; i < effects.size(); i++) {
       GlEffect effect = effects.get(i);
       if (effect instanceof GlMatrixTransformation) {
@@ -396,7 +364,7 @@ private void processInputFrame() {
     long presentationTimeUs = inputFrameTimeNs / 1000 - streamOffsetUs;
     inputSurfaceTexture.getTransformMatrix(inputSurfaceTextureTransformMatrix);
     inputExternalTextureProcessor.setTextureTransformMatrix(inputSurfaceTextureTransformMatrix);
-    FrameInfo inputFrameInfo = pendingInputFrames.remove();
+    FrameInfo inputFrameInfo = adjustForPixelWidthHeightRatio(pendingInputFrames.remove());
     checkState(
         inputExternalTextureProcessor.maybeQueueInputFrame(
             new TextureInfo(
@@ -409,6 +377,27 @@ private void processInputFrame() {
     // asynchronously by the texture processors chained after it.
   }
 
+  /**
+   * Expands or shrinks the frame based on the {@link FrameInfo#pixelWidthHeightRatio} and returns a
+   * new {@link FrameInfo} instance with scaled dimensions and {@link
+   * FrameInfo#pixelWidthHeightRatio} 1.
+   */
+  private FrameInfo adjustForPixelWidthHeightRatio(FrameInfo frameInfo) {
+    if (frameInfo.pixelWidthHeightRatio > 1f) {
+      return new FrameInfo(
+          (int) (frameInfo.width * frameInfo.pixelWidthHeightRatio),
+          frameInfo.height,
+          /* pixelWidthHeightRatio= */ 1);
+    } else if (frameInfo.pixelWidthHeightRatio < 1f) {
+      return new FrameInfo(
+          frameInfo.width,
+          (int) (frameInfo.height / frameInfo.pixelWidthHeightRatio),
+          /* pixelWidthHeightRatio= */ 1);
+    } else {
+      return frameInfo;
+    }
+  }
+
   /**
    * Propagates the end-of-stream signal through the texture processors once no more input frames
    * are pending.

library/transformer/src/main/java/com/google/android/exoplayer2/transformer/VideoTranscodingSamplePipeline.java

@@ -119,7 +119,6 @@ public void onFrameProcessingEnded() {
                   }
                 }
               },
-              inputFormat.pixelWidthHeightRatio,
               streamOffsetUs,
               effectsListBuilder.build(),
               /* outputSurfaceProvider= */ encoderWrapper,
@@ -129,7 +128,8 @@ public void onFrameProcessingEnded() {
       throw TransformationException.createForFrameProcessingException(
           e, TransformationException.ERROR_CODE_GL_INIT_FAILED);
     }
-    frameProcessor.setInputFrameInfo(new FrameInfo(decodedWidth, decodedHeight));
+    frameProcessor.setInputFrameInfo(
+        new FrameInfo(decodedWidth, decodedHeight, inputFormat.pixelWidthHeightRatio));
 
     decoder =
         decoderFactory.createForVideoDecoding(